Manufacture of glass articles.



No 778,807. PATENTED OCT. 25, 1904. F. L. 0. WADSWORTH.

MANUFACTURE OF GLASS ARTICLES.

APPLICATION FILED JUNE 22, 1904.

N0 MODEL. 2 SHEETS-SHEET 1.

PATE-NTED 00w. 25, 1904.

FQL. 0. WADSWORTH.

MANUFACTURE OF GLASS ARTICLES.

APPLICATION FILED JUNE 22, 1904.

ZSHEETS-SHEET 2.

NO MODEL.

lzz lzhwfwkliwm ZZI wwmtoz BR amo No. 773.307. Patented October 25, 1904.

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UNi-reo STATES PATENT FRANK L. O. IVADSIVORTH, OF MORGANTOVVN, WVEST' VIRGINIA, ASSIGNOR TO PRESSED PRISM PLATE GLASS COMPANY, OF MORGANTOWN, WEST VIRGINIA, A CORPORATION OF WEST VIRGINIA.

MANUFACTURE OF GLASS ARTICLES.

SPECIFICATION forming part of Letters Patent No. 773,307, dated October 25, 1904. Application filed June 22, 1904. Serial No. 213,668. (No model.)

To all whom it y concern: flattening the molded projections or ribs by Be itknown that LFRANKL. O. NADSWORTH, embedding a wire mesh therein. 7 of Morgantown, Monongalia' county, West By the intermediate step of pressing the 5 Virginia, have invented a new and useful Improjections on the surface of the sheet before provement in the Manufacture of Glass Artiflattening or reshaping them I am enabled to cles, of which the following-is a full, clear, and secure projections which are very sharply deexact description. fined and may be made narrow, whereas if In the drawings, Figure 1 shows in side elethis step were omitted and it were attempted 55 vation, partly in vertical section, a machine to employ a two-step operation of rolling the IQ adapted for the practice of my invention. projections and then flattening them the pro- Fig. 2 is a vertical cross-section on the line II jections would be obtuse and badlydefined and II of Fig. l, showingone end of the roll in secgenerally unfit for the purpose for which they tion. Fig. 3 is a sectional view showing a glass are intended. By first spreading the sheet by 60 plate with projecting ribs formed thereon by rolling I am enabled to make the sheet of any S the machine shown in Fig. 1. Fig. 4: shows a desired size, and this could not be done if the grooved roller which may be employed in the preliminary rolling operation were omitted. preliminary operation of spreading the sheet Figs. 1, 2, and 3 illustrate one form of the preparatory to forming and shaping the proapparatus for the practice of my invention. 5 jections thereon by pressing. Fig. 5 shows In these figures, 2 is a table on which the body in section the moldingsurface of the die of plastic glass to belmolded is placed. This changed preparatory to the final molding of table is mounted upon standards 4:, adapted the glass by the interposition of a wire mesh, to be moved vertically, preferably by a cylwhich then forms part of the molding-surface inder 5 and intermediate connecting mechan- 7 and is forced upon the glass by the die. Fig. ism, which consists, preferably, of a pitman 5 6 shows in vertical cross-section means where- 19, connected with the piston and connected by the wire mesh is placedin position. Fig. by levers 6 and rods 20 to shafts 21, which 7 is a cross-sectional view illustrating the act by levers 22 and links 23 are connected to of forcing the wire mesh upon the projections vertical slides 24, by which the table is guided 7 5 of the sheet. Fig. 8 shows the glass sheet, in its vertical motion. The cylinder is pro- 3 which is the product of the operations illusvided with suitable fluid-supply connnections,

trated in Figs. 5 to 7. Fig. 9 shows a section the rise of the table being eflected by the adof modified form of die which may be used mission offluid and its descent being effected in place of that shown in Figs. 1, 5,, and 7 by gravity. The position of the table when 80 and Fig. 10 shows the article as produced by at its lowestpoint is determined by an adjustthis modified form of die employed in same able stop consisting, preferably, of an eccenmanner. trio 7 ,which is adapted to be engaged by and My invention is primarily designed for the to stop part of the connecting mechanism 6. manufacture of glass tiles having ribs or pro- 8 is a carriage on which a molding-plate 9 is 5 jections formed on the rear surface, which mounted and is preferably backed yieldingly 4 ribs are flattened or widened at their ends and by springs 10, and on the carriage is a roll 11, inclose and hold a mesh, so as to form keys which may have a plain face and is rotated for holding the tiles to a bed of cement. by suitable power connections 12. The car- 'My invention in one of its features consists riage is capable of horizontal motion to bring 9 in an operation embodying at least three the roll 11 and plate 9 successively over the steps-namely, first spreadinga body of glass table 2, and for this purpose I may employ into sheet form, then molding the sheet with on the table driven pinions 13, which engage projections or ribs on its surface, and then with stationary racks 14.

The operation is as follows: The table 2 is set in its lowest position permitted by the occentric T, which has been adjusted by a handle 7 to sccu re the desired thickness of glass, the plastic glass is placed thereon, and the carriage 8 is advanced so as to move the roll 11 over the glass and to spread it upon the table into a fiat sheet. Farther advance of the carriage moves the roll beyond the table and brings over the glass the molding-plate 9, whose under surface is formed with grooves of suitable shape to impress upon the glass the desired ribs or projections. Then by actuating the cylinder 5 the table is raised and the glass sheet being pressed thereby against the plate 9 is molded with the projections or ribs 18. (Shown in Fig. 3.) The table is then lowered by reverse operation of the cylinder, and the stop 7 is adjusted, so as to permit it to descend farther than the position which it occupied during the operation of the roll.

1n the modified apparatus (shown in Fig. 4) the roll 11 is formed with grooves, the purpose of which is not to form ribs or projections to final shape, but simply to make prominences on the sheet preliminary to the second step of molding with the die 9. grooves of the die are brought directly above the prominences, so that the thickened portions of the glass at those places will more readily fill the grooves and enable the die to be made with deeper grooves than would otherwise be practicable. The presence of the prominences also enables the molding op eration to be performed with the least possible displacement of the glass in the grooves, and this tends to secure sharper definition of the ribs on the finished sheet and. to prevent molecular straining of the glass.

As shown in Figs. 5 and 6, the moldingsurface of the die is changed between the sec- 0nd and third steps by inter-posing a sheet of wire fabric between the glass and the die-surface. I may do this by employing a frame 25, on which a sheet 26 of wire fabric may be stretched, the frame being adapted to be litted to the sides of the die by interfitting slidei'langes 27, so that when thus applied the fabric 26 will be directly beneath the die-surface. The frame is placed on the end of the die before the first molding operation, and as soon as this operation 1s completed 1t may be The slid horizontally along the die to bring the fabric directly under the die-surface. The glass and die are then brought together, the effect of which will be to cause the ribs on the glass to pass through the mesh of the fabric to some extent and to project above the same. This operation flattens the projections and causes a firm union between the fabric and the glass,as shown in Fig. 8,and thefabric will then serve as a locking-surface by which the glass may be applied securely to walls with plaster or cement. The fabric should be clamped by clamping mechanism 28 to the frame 25, so that at the end of the third step it may be detached from the frame preliminary to removing the glass from the apparatus.

ln Fig. 9 I show a modified form of die in which the grooves which form the projections on glass are closer together and of such form that the glass will more readily enter therein on pressing. The form of the finished article produced by this form of die is shown in Fig. 10.

\Vithin the scope of my invention as defined in the claims those skilled in the art will be able to modify in many other ways the means employed for carrying out the process, since Nhat 1 claim is 1. The method of making glass articles which consists in the combination of at least the following three steps, namely; first, spreading the glass into a sheet, then pressing its surface to form projections thereon and then reshaping the surface of the projections, and simultaneously interlocking a mesh therewith; substantially as described.

2. An article of manufacture composed of a glass plate or sheethaving wire embedded in the glass with projecting loops; substantially as described.

3. An article of manufacture consisting of a glass plate or sheet with surface projections, and wire held by the projections and affording intermediate loops; substantially as described.

In testimony whereof I have hereunto set my hand.

FRANK L. O. W ADS'WORTH.

\Vitnesses:

THOMAS W. BAKEWELL, H. M. Coewm. 

